JPH06238384A - Production device of rolled metal sheet with high precision sheet thickness - Google Patents

Abstract

PURPOSE:To provide a production device capable of preventing edge drop without impairing a sheet thickness precision in the longitudinal and width directions of thin metal sheet and improving the anisotropy of rolled metal sheet. CONSTITUTION:It is a production device that a long length metal sheet 1 is sandwiched between a die 2, which has a taper shaped working face 4/flat working face 5 and is arranged with a clearance limiting edge 6 at both ends of these working face, and a roll 3 rolled along working face, and a metal sheet is intermmitently transferred in the longitudinal direction at every completion of rolling. Further, a taper shaped working face 4 is formed in a taper shaped longitudinal direction working face raised in two steps also, a width direction taper part 7a, 7b extending to both ends of width direction is formed in the longitudinal direction working face and flat working face. By this method, edge drop is prevented, a metal sheet having an uniform sheet thickness in the width and longitudinal directions is obtained, the rolled sheet, which has super high precision and anisotropy of metal sheet material and is improved without having waste to remove both ends, is quickly produced.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention manufactures a metal plate such as a strip steel which is used for electronic equipment, precision machinery, etc. with high accuracy of thickness and improved mechanical anisotropy. A device suitable for.

[0002]

2. Description of the Related Art Conventionally, as a method for producing a flat and thin metal plate having a high plate thickness accuracy, a method described in Japanese Patent Publication No. 2-51695, which is related to an application by the present applicant, is known. This method, as shown in FIGS. 1 and 2, includes a long metal plate a, a metal mold d having a tapered processing surface b and a subsequent processing surface c of a flat portion, and a metal surface along the processing surface. There is known a method in which the metal plate a is interposed between rolls e that are rolled, and the metal plate a is intermittently moved in the lengthwise direction every time the rolling of the roll e is completed, and the metal plate a is rolled. According to this method, for example, a stainless steel plate having a thickness of 1.2 mm and a plate thickness accuracy of ± 3/1000 mm can be manufactured. Further, in a general roll rolling method, there is a phenomenon in which a rolled plate has an edge drop, that is, a plate thickness at both end portions of the plate becomes thinner than a central portion, and since both end portions of the plate have no predetermined plate thickness. Since it will be used after being removed, the material is wasted. Therefore, a roll for rolling this is provided with a crown, and the metal plate f is rolled by a pair of rolls g and g as shown in an exaggerated manner in FIG. Things are also being done. The edge drop also occurs in the rolling method shown in FIGS. 1 and 2, and both ends of the metal plate are cut off after rolling to obtain a product.

Further, in the conventional general roll rolling method,
A metal plate causes mechanical anisotropy when the crystal is stretched in the rolling direction (length direction), and mechanical properties and physical properties are changed depending on the direction of the metal plate, that is, the length direction, the width direction, the diagonal direction, and the like. There is also a disadvantage that the physical properties become anisotropic and the use direction of the material is limited.

[0004]

If the roll e used in the die rolling method of FIGS. 1 and 2 is formed into a crown shape as shown in FIG. 3, the plate thickness in the width direction can be obtained even by the die rolling method. Although it is possible to control and eliminate the edge drop, it is difficult to control the roll crown, and it is not possible to sufficiently control the plate thickness in the length direction with high precision due to the uneven elongation of the material. Also,
In order to suppress or prevent the anisotropy of the rolled metal sheet by roll rolling, usually, there is no other than heat treatment, and such treatment is troublesome.

According to the present invention, the thickness accuracy of the thin metal plate in the length direction is made highly accurate, and edge drop can be prevented in the width direction without impairing the plate thickness accuracy and the mechanical anisotropy due to rolling is mitigated. It is an object of the present invention to provide a manufacturing apparatus that can be manufactured.

[0006]

According to the present invention, a long metal plate is provided with a tapered working surface and a flat working surface following the tapered working surface, and the flat working surfaces are provided on both sides of these working surfaces. And a roll having a step height whose rising height is equal to a desired plate thickness, and a roll that rolls along the machined surface. In the apparatus for rolling by moving the metal plate intermittently in the length direction, a tapered work surface of the die is raised in two steps in the length direction of the metal plate. In order to achieve the above object, it is formed on the machined surface in the lengthwise direction and the widthwise tapered portions extending to both ends in the widthwise direction are formed on the machined surface of the lengthwise machined surface and the subsequent flat surface. I chose

[0007]

When one side of the metal plate is placed on the tapered work surface of the mold and the work surface of the flat portion and the roll is rolled while being in contact with the gap control surface of the mold, the metal plate The wall thickness is reduced by the taper of the mold. After rolling the roll, the metal plate is slightly moved in the length direction and the roll is rolled again. By repeating the rolling, the metal plate gradually decreases in thickness and becomes higher at the flat portion of the processed surface. Processed to the desired plate thickness with precision. Although such an action is substantially the same as that of forming a taper on the conventional processed surface, in the present invention, the tapered processed surface of the mold is provided in two steps in the length direction of the metal plate. Since the taper-shaped lengthwise machined surface is raised, and the widthwise taper portion extending to both widthwise end portions is formed on the machined surface of the lengthwise machined surface and the subsequent flat portion,
The metal plate has its thickness reduced in the first stage of the tapered surface, and when the thickness is reduced in the second stage, the material is slightly moved due to the taper in the width direction, so that edge drop is prevented. It Since the processed metal plate has no edge drop, it is not necessary to cut off both ends of the metal plate, and the waste of material and the process for cutting can be omitted.

Further, in the metal plate processed by the apparatus of the present invention, the deformation behavior is high in the flow rate in the width direction, and there is usually a phenomenon that the crystal orientation is aligned as compared with the rolled material in which the crystal orientation is aligned in the length direction. It is suppressed and the mechanical anisotropy of the material is relaxed.

[0009]

EXAMPLE An example of the present invention will be described with reference to FIG.
In the figure, reference numeral 1 is a long metal plate such as stainless steel or copper alloy, 2 is a mold, and 3 is a roll. The mold 2 is shown in FIG.
As shown in FIG. 3, a taper-shaped machined surface 4 and a flattened machined surface 5 following the tapered machined surface 4 are provided, and the rising height from the machined surface 5 of the flat part is desired on both sides of the machined surfaces 4 and 5. The gap regulation edges 6 having a step equal to the thickness are provided. The roll 3 reciprocally rolls in the length direction of the metal plate 1 while being in contact with the gap regulating edges 6, 6, and the pressure contact between the die 2 and the roll 3 is released every time the reciprocal rolling of the roll 3 is completed. Repeatedly intermittently moving the metal plate 1 in the lengthwise direction, the metal plate 1 is gradually rolled and rolled to a plate thickness set to a rising height from the machined surface 5 of the flat portion. Although substantially the same as the conventional one, in the present invention, in order to prevent the edge drop of the rolled metal sheet 1, the tapered processing surface 4 is used.
As shown in FIG. 5, the lengthwise machined surfaces 4a, 4b are raised in two stages in the lengthwise direction of the metal plate 1 by a first stage and a second stage.
Further, as shown in FIG. 6, the widthwise taper portion 7 extending to both end portions in the width direction on the processing surface 4 and the processing surface 5 of the flat portion.
a and 7b are formed.

The metal plate 1 is rolled by a roll 3 which rolls in contact with the mold 2. The metal plate 1 is rolled by the widthwise taper portions 7a and 7b before the rolling progresses to a predetermined plate thickness.
The material is moved to both ends thereof to some extent, and the rolled metal sheet 1 has no edge drop.

A specific embodiment of the present invention has a dimension (thickness ×
Width x length) 1.4 × 60 × 50000 mm JIS SPCE-SD strip steel strip metal plate is rolled at a processing rate of 10.7% to produce a long strip steel plate with a thickness of 1.25 mm. It is as follows. As shown in FIG. 2 as the mold 2, the target dimension (step) D is 1.25 mm, the taper of the first-stage lengthwise machined surface 4a is 1/800, and the second-stage lengthwise machined surface 4b is taper. 1/500
0, width direction taper parts 7a, 7b taper is 1/600, and the machined surface 5 of the flat part is machined and polished to have a size of length x width of 40 x 30 mm. As a roll 3, a diameter of 90 mm, long 120 mm
Prepare the rolling roll. Then, as in the conventional case, the roll 3 is pressed and rolled while contacting the gap regulating edges 6, 6 of the mold 2, and the metal plate 1 is moved by 5 mm in the direction of the arrow each time the rolling is completed, and the desired plate is rolled. A thick rolled metal sheet was produced. The variation of the thickness of the manufactured metal sheet 1 in the length direction is as shown by the curve A in FIG. 7, and the variation of the thickness of the JIS SPCE-SD strip steel strip as shown by the curve B in the same figure. Therefore, it can be seen that the plate thickness is made uniform on the order of several microns in the length direction. Further, the manufactured metal plate 1 had a material having an edge drop in the width direction as shown by the curve C in FIG. 8. The edge drop disappeared, and a better result was obtained than when rolling was performed only by normal roll rolling (curve E). In the case of curve D, both ends are slightly thicker,
If the rolled metal plate is further rolled or the taper in the width direction of the die is moderated, the thickness can be corrected.

Next, as an example of improving anisotropy, JIS permalloy B having dimensions (thickness × width × length) of 0.5 × 60 × 50000 mm
The following is a description of a case where a metal strip of a magnetic material steel strip of a grade is rolled at a working rate of 20% by the apparatus of the present invention to produce a long strip steel having a sheet thickness of 0.4 mm.

As shown in FIG. 2 as a mold, a target dimension D
Is 0.4 mm, and the taper of the first length machined surface 4a is 1/150
0, the taper of the second stage processed surface 4b is 1/3333, the taper of the widthwise tapered portions 7a and 7b is 1/500, and the vertical and horizontal dimensions of the processed surface 5 of the flat portion are processed and polished to 40 × 30 mm. The prepared metal sheet was prepared and a rolled metal plate was manufactured in the same manner as in the above-mentioned example. FIG. 9 shows the results of comparative measurement of the Young's modulus of the manufactured magnetic material metal plate with respect to the material direction and the Young's modulus of the metal plate manufactured by ordinary roll rolling of the same material. According to these results, it can be seen that the anisotropy of the Young's modulus curve F of the metal plate manufactured by the apparatus of the present invention is relaxed more than that of the conventional Young's modulus curve G of the metal plate obtained by roll rolling.

[0014]

As described above, according to the present invention, the tapered working surface of the metal mold for producing a highly accurate thin metal plate has two stages in the length direction of the metal plate. Since the taper-shaped lengthwise machined surface was raised and the widthwise taper portion extending to both widthwise end portions was formed on the machined surface of the lengthwise direction surface and the flat surface, in the process of gradually rolling thinly. The material of the metal plate can be moved in the width direction to prevent edge drop, and a metal plate having a uniform thickness in the width direction and the length direction can be obtained in one step, and both ends of the rolled metal plate are removed. This is advantageous in that it is possible to produce economically and swiftly rolled material with high precision without waste of money, and also to produce rolled material with improved mechanical anisotropy.

[Brief description of drawings]

FIG. 1 is a side view of a conventional example.

FIG. 2 is a perspective view of the mold shown in FIG.

FIG. 3 is an explanatory view of a conventional rolling method for preventing edge drop.

FIG. 4 is a perspective view of an embodiment of the present invention.

5 is a perspective view of a manufacturing process of the mold shown in FIG.

6 is a perspective view of the mold of FIG.

FIG. 7 is a measurement diagram of plate thickness variation in the length direction of a metal plate rolled by the apparatus of the present invention.

FIG. 8 is a measurement diagram of plate thickness fluctuation in the width direction of a metal plate rolled by the apparatus of the present invention.

FIG. 9 is a measurement diagram of Young's modulus with respect to the directionality of a metal plate rolled by the apparatus of the present invention.

[Explanation of symbols]

1 metal plate 2 mold 3
Rolls 4, 4a, 4b Tapered lengthwise machined surface 5 Machined surface of flat part 6, 6
Gap control edge 7a, 7b Width direction taper part

Claims (2)

[Claims] 1. A long metal plate having a tapered machined surface and a machined surface of a flat portion subsequent to the machined surface, and a plate having a desired rising height from the machined surface of the flat portion on both sides of the machined surface. It is interposed between a die having a gap regulating edge having a step equal to the thickness and a roll which rolls along the working surface, and the metal plate is longitudinally arranged at each end of the rolling of the roll. In a device for intermittently moving and rolling between the two, the tapered machined surface of the die is formed into a tapered machined machined surface which is elevated in two steps in the length direction of the metal plate. At the same time, a width direction taper portion extending to both ends in the width direction is formed on the length direction machined surface and the subsequent machined surface of the flat portion, and a manufacturing apparatus for a metal plate having a high precision plate thickness. 2. The first on the machined surface in the length direction of the mold.
The gradient of the machined surface in the step and the machined surface in the width direction is larger than the gradient of the machined surface in the second step of the machined surface in the length direction. apparatus.